#include <iostream>
#include <stdio.h>
#include <string>
using namespace std;

int main()
{
    string s1("aaabbbcccdddeee");
    string s2 = s1;

    printf("s1:%p\n",s1.c_str());
    printf("s2:%p\n",s2.c_str());

    s2[0] = 'x';

    printf("s1:%p\n",s1.c_str());
    printf("s2:%p\n",s2.c_str());
    return 0;
}
